They are the same size as stock.
Id recommend using an impact gunto break the nuts loose, and if the bolts get stuck in the rubber in the front, use a ratchet/wrench to spin em' free. (that is the problem i had).
With no hiccups, it should take you about 2 hours max to change em all out. rear take about 15 min each, fronts are a little more complicated cause of the can.

89 4Runner
3" BL, M/T locks, 33"bfg mt, bilstein, Kayline, tubebumper, toyotafiberglass panels
TBI: Elocker,3.4 w/ORS,b+b,S2Sstg2cams,arias pistons,P+P intake,TRDs/c,URDpullies+7th,downey headers,MAPECU2,WEGO WB, SupraMAF,walboro255,stg4clutch, EPaOo2 sim